Indentation creep studies of iron aluminide intermetallic alloy

被引：24

作者：

Sharma, G ^{[1
]}

Ramanujan, RV

Kutty, TRG

Prabhu, N

机构：

[1] BARC, Div Mat Sci, Bombay, Maharashtra, India

[2] Nanyang Technol Univ, Sch Mat Engn, Singapore 2263, Singapore

[3] BARC, Radiomet Div, Bombay, Maharashtra, India

[4] Indian Inst Technol, Bombay 400076, Maharashtra, India

来源：

INTERMETALLICS | 2005年 / 13卷 / 01期

关键词：

iron aluminides (based on Fe3Al); creep (properties and mechanisms); mechanical properties at high temperatures;

D O I：

10.1016/j.intermet.2004.05.008

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Indentation creep behaviour of iron aluminide intermetallic (Fe-28Al-3Cr) was studied in the temperature range of 843-963 K. The hardness and the plasticity parameter were also calculated from room temperature to 1273 K. The variation of hardness with time showed that the stress exponent (n) was weakly dependent on temperature. Thermal activation parameter-activation area and energy were also calculated to identify the creep mechanism. The activation energy for high temperature creep was found to be in good agreement with that for selfdiffusion of pure iron and in excellent agreement with previous studies. These values of n, activation area and activation energy were found to be consistent with dislocation climb as the rate controlling creep mechanism. Conventional creep curves were also derived from hardness values.

引用

页码：47 / 53

页数：7

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